Key punch



'Nov- 24, 1936. N. s. wELK T AL 2,062,153l

KEY `PUNCH I Filed sept.. 14, 1935 3 Sheets-Shea?L 1 13 zo at "f f4@ 5 u le -lk y N124, 1936. NSWELK -AL- :2,062,153

KEY PUNCH Filed sept. 14, 1935 5 sheets-sheet l2 xm@ www? Nov. 24, 1936. N. s. wELK ET AL 2,062,153

KEY PUNCH Filed Sept. 14, 1935 3 Sheets-Sheet 3 VENTO woddg. mi

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FIG '7 ooooooooooooooooo Ol A /M G00 000000 Patented Nov. 1936 y UNITED STATES PATENT oFFlC-.E

l Nelson s. welk-ana nonna A'. Nevin. Athena.

Ohio,

assignors to The McBec' Company.

Athens, 0hio, a corporation of Ohio Application september 14, 1935, sei-1d No. 40.580

1 canna. (c1. 164-112) jar the rockerV arms 8, into the lowered posi-- tion, notwithstanding the spring pressed frictional means provided tol prevent such an occurrence.' Our present invention has for its object to provide an improved construction which will prevent this happening. A further object is 'to provide a construction whicnwin eliminate the use of Ithe :fictional washers in the device.

It has also been found inpractice that during rapid operation of the device that the depressionof one of the actuatingv keys, will carry the adjoining key with it due to the frictional engagement ofthe friction washers, which separate' the keys. 'I'his occurs more frequently i when two keys which straddle a third key are depressed for the frictional contact will cause 'the two to carry the third key with them into .D the depressed position: this is not desired.

pressed and the rocker arm in position to punch,

the repeat key remaining in its normal position;

Fig. 3 isa. vertical sectional view showing a key depressed and the operating lever moved to its lowerposition, thecard (not shown) having been punched, the parts being in their position just prior to their 'return to normal;

Fig. 4 is a similar view with the operating lever being returned to normal and the punch being retracted from the die;

Fig. 5 is a fragmentary sectional view of the forward key stem lever guide, taken on the line ,f 8-8 in Fig. 2, some parts being omitted for clarity; E,

Fig. 6 is a fragmental detail view of the rear I guide showing the locking springs and plungers,

the key stem levers being shown in section, taken punched; and

onthelineS-Sofliimiiomittingsomeoithe parts for clearness.

Fig. 'I is a front view of a card which has been F'ig.` 8 is'an enlarged detail view of the key 5 locking plungers. l

Similar reference numerals refer to similar parts throughoutv the entire description. Y y

As shown-in Figs. 1 and 2 in the drawings the mechanism is enclosed in a suitable| casing I. l0 The casing is provided with a keyboard 2, in which lare mounted a plurality of selective keys 3, which may be provided with suitable indicia corresponding to indicia placed on the card adjacent the position to be punched. These cards l5 are fully described in patent to Perkins No. 1,544,172, so a description of them` is not deemed necessary here.

Each or the keys 3 is secured in some suitable manner to a key stem lever I. These levers are 20 mounted to rock upon a shaft 6, which extends from one end wall of the ca'slng I to the other end wall. The inner end of each key stem lever. 5, is in the same plane as a rocker arm 1, which' serves to reciprocate the punches 8.' As ^the 25 rocker arms I are duplicates we will describe the construction of a single one only. A slot 9, is provided adjacent the upper end of said rocker arm 5. A rocker arm shaft I0 through the slot 8 and all of therocker arms swing-on 30 said shaft when actuating the punches.

A slot HI is provided in the top portion of the casing I, in which may be placed the cards whi are to be punched;

A suitable die i12 is mounted below the slot vI I. 35 lIn the die I2. are located a number of reciprocating punches l. Since these punches and their v actuation are fully described in the Welk patent referred to we will omit a detail description thereof.

4o A crank shaft il, has its ends suitably jour- Vnaled in bearings (not shown) secured to the end walls of the casing I. A plurality of crank arms I5 in number corresponding to the rocker -arms, are rigidly secured to the crank shaft. 45

' that oscillation of the crank shaft Il will operate to oscillate on the rocker arm shaft, I8. The, crank shaft I4 may be oscillated by means of a lever I1, shown in dotted lines, or in` any other desired manner.

AsshowninFig.2,thekeys3,areinelevaiedor normal position. Pressure upon the operating K lever will'rotatethe crank shaft Il, in counterclockwise direction and vthrough the medium of the crank arms and connecting links l5, will cause' the rockerarm 1 to swing rearwardly without actuating apunch. Upon release of the lever IIftheparts will be restored to normal by means of the tension of spring i3, pulling on the crank arm l5. WhenA a key4 is depressed as shown in Fig. 2, the inner end of the key stem lever 5 will elevate its corresponding rocker arm l to a position in which it can actuate its punch.

. the rocker arms in elevated position during the repeat operation ls clearly shown in Figs. 2 and 3, and comprises a key stem lever 5, which is formed with an upwardly extending portion 2l the edge of which has two V shaped notches 2| and 22, cut or formed therein. A numberof spring pressed plungers 23 are provided to engage the notches 2| and 22, one for each key stem lever. These plungers 2 3, more clearly seen in Fig. 8, are carried by a bar 24 which extends from end to end of the casing and is suitably secured thereto in any convenient manner (not shown). The bar 24 may be conveniently formed as clearly seen in Fig. 8 of the drawings to carry the housing for springs 25 which actuate the plungers 23. Normally as shown'in Figs. 1 and 4 the plunger 23 is in notch 2|. Depressing key 3 Vwill swing the key stem lever 5 on shaft 6 and this will swing the notches 2| and 22 in an arc and vthe plunger 23 will move into mesh with notch 22. rIhe springs 25 vare of suillcient tensi'on so that regardless of the vibration of the parts the plunger.V will hold the weight of thel -rocker arm and its associated parts in their ele-I vated position for the repeat operation. We ex- .3| of the key stemlevers 5. -It will be seen from the foregoing 'that we have provided positive means forovercoming the objections developed in practice, which means will not interfere with the operation of the device.

Having described our invention what we resard as new and desire to secure by Letters Patent is:

1. In a device of the character described, a plurality of rocker arms, va shaft on which they are mounted to permit pivotal and vertical movement of each rocker arm,..punches actuated by the swinging of said rocker arms, a plurality of selective keys to designate certain predetermined punches to be actuated by certain of said rocker arms, means actuated by the movement of said keys to elevate said rocker arms, spring means which engage and hold said elevating means in position, positive means to prevent the depression of one key carrying With ,it 11 ad` aoearss jacent key. and means to perform a repeat operation.

2. In a device of the 'character described, a plurality of rocker arms, a shaftjon which they aremounted to permit pivotal and vertical movement of each rocker arm. punchesactuatedby the swinging of said arms, a plurality of selective keys to designate certain predetermined punches Y Y -to be actuated by certain of said rocker arms'l a key stem lever operated by the depressing of aV key to elevate a rocker arm into position to actuate its punch, means to perform a repeat operation, positive means to' prevent the depression of one key carrying withit an adjacent key, and means which engage said key stem levers to hold certain of said keys in a depressed position.

3. In a device of the character described, a plurality of rocker arms, a shaft on which they are mounted to permit pivotal and vertical movement of each rocker arm, punches actuated by the swinging of'vsaid rocker arms, a plurality of selective levers to designate certain predetermined punches to be actuated by certain of said rocker arms', means actuated'by Ytime movement of said keys to elevate said rocker arms, spring pressed means which engage and hold said elevating means inl position, means to perform a repeat operation, and a bar in which said spring pressed means are mounted, a portion of said bar providing guides for said elevating mechanism.

4. In a. device of the character described, a plurality of rocker arms, a shaft on which they are mounted to permit pivotal and vertical movement of each rocker arm, punches actuated by the swinging of said arms, a plurality of selective keys to designate certain predetermined punches to be actuated by certain of said rocker arms, a key stern lever operated by the depressing of a key to elevate a rocker arm into position to actuate its punch, a guide for said key stem levers, means to perform a repeat operation, means which engage said key stem levers to hold certain of said keys in a depressed position, and a second guide located in the forward part of said casing.

5. In a device of the character described, a plurality of rockerarms, a shaft on which they are mounted to permit pivotal and vertical movement of each rocker arm, punches `actuated by the swinging of said arms, a plurality of selective keys to designate certain predetermined punches to be actuated by certain of said rocker arms, a key stem lever operated by the depressing of a key to elevate a rocker arm into position to actuate its punch, means to perform a repeat operation, there being notches on said key stem levers, an angle bar which extends across the key stem levers, a housing secured to said bar a plurality of coil springs insaid housing one for each key stem lever, plungers actuated by said- 'coil springs which engage said notches to hold the depressed keys in that position.

6. In a-device of the character described, a

plurality of rocker arms, a shaft on which they are mounted to permit pivotaland vertical Inove-` 'ment of each rocker arm, punches actuated by the swinging of said rocker arms, a plurality of selective keys to designate certain predetermined punches to be actuated by certain of said rocker arms, a plurality of keystem levers actuated by said keys, a bar which extends across said key stem levers, and spring pressed means mounted in said bar, a portion of said bar providing guides for said elevating mechanism.

7. In a device of the character described, a plurality of rocker arms. a shaft on which they are mounted to permit pivotal and vertical movement of each rocker arm. punches actuated'by the swinging of said rocker arms, a plurality of selective keys to designate certainpredetermined punches to be actuated by certain of said rocker arms,'a plurality of spring'pre'ssed plungexs, a plurality of key steml levers adapted when in a 'certain position to be engaged by said plungers, spring pressed plungers mounted in said bar, a

portion oi' said bar providing guides for saldeievating mechanism, and a second guide located in the forward part of said casing.

NELSON S. WELK.- DONALD A. NEV'IN. 

